.App {
  text-align: center;
}

.App-logo {
  animation: App-logo-spin infinite 20s linear;
  height: 80px;
}

.App-header {
  background-color: #222;
  height: 150px;
  padding: 20px;
  color: white;
}

.App-intro {
  font-size: large;
}

@keyframes App-logo-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

input{
  padding:5px;
  width: 120px;
  margin-top: 10px;
  text-align: left;
  float: left;
  margin-left: 5px;
  display: inline-block;
}
.item{
  background-color: #efefef;
  cursor: pointer;
  display: block;
  margin-bottom: 1px;
  padding: 8px 12px;
  width: 120px;
}
/*进入前*/
.example-enter{
  opacity: 0;
  transform: translateX(-250px);
}
/*进入后*/
.example-enter.example-enter-active{
  opacity:1;
  transform: translateX(0);
  transition: 0.3s;
}
/*离开前*/
.example-leave{
  opacity:1;
  transform: translateX(0);
}
/*离开后*/
.example-leave.example-leave-active{
  opacity:0;
  transform: translate(250px);
  transition: 0.3s;
}
/*挂载阶段动画*/
.example-appear{
  opacity: 0;
  transform: translateX(-250px);
}
/*挂载动画最后位置*/
.example-appear.example-appear-active{
  opacity:1;
  transform: translate(0);
  transition: .5s;
}